What is A106 Grade C Pipe?

ASTM A106 Seamless Pressure Pipe (also known as ASME SA106 pipe) is commonly used in the construction of oil and gas refineries, pipelines, power plants, petrochemical plants, boilers, and ships where the piping must transport fluids and gasses that exhibit higher temperatures and pressure levels. ASTM A106 pipe (also covered in ASME specifications as S/A 106) is the standard specification for seamless carbon steel pipe for high-temperature service.

The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.

Chemical
Requirements

Grade A

Grade B

Grade C

Carbon max. %

0.25

0.30

0.35

Manganese %

0.27 to 0.93

0.29 to 1.06

0.29 to 1.06

Phosporous, max. %

0.025

0.025

0.025

Sulfur, max. %

0.025

0.025

0.025

Silicon, min. %

0.10

0.10

0.10

Tensile
Requirements

Seamless
Grade A Grade B Grade C

Tensile Strength, min., psi…………………….. 48,000 60,000 70,000

Yield Strength, min., psi………………………. 30,000 35,000 40,000

Hydrostatic Testing

Inspection test pressures produce a stress in the pipe wall equal to 60% or specified minimum yield strength (SMYS) at room temperature. Maximum Pressures are not to exceed 2500 psi for NPS 3 and under and 2800 psi

for the larger sizes. Pressure is maintained for not less than 5 seconds.

Permissible Variations in Weights per Foot

Weight of any length shall not vary more than 10% over and 3.5% under that specified.
NOTE — NPS 4 and smaller — weighed in lots. Larger sizes — by length

Permissible Variations in Outside Diameter

Outside Diameter at any point shall not vary from standard specified more than–

A106 Grade C Pipe HS Code

730410 Line pipe of a kind used for oil or gas pipelines: Of iron or nonalloy steel:730420 Casing, tubing and drill pipe, of a kind used in drilling for oil or gas: Casing:730431 Tubes, Pipes and Hollow Profiles, of Iron or Non-alloy Steel, Cold-drawn or cold-rolled (cold-reduced)730439 Other Tubes, Pipes and Hollow Profiles, of Iron or Non-alloy Steel730441 Tubes, Pipes and Hollow Profiles, of stainless steel , Cold-drawn or cold-rolled (cold reduced)730449 Other Tubes, Pipes and Hollow Profiles, of Stainless Steel, Seamless730451 Tubes, Pipes and Hollow Profiles, of Other Alloy Steel, Cold-drawn or cold-rolled (cold reduced)730459 Other Tubes, Pipes and Hollow Profiles, of Other Alloy Steel,730490 Other Tubes, Pipes and Hollow Profiles, Seamless, of Iron or Steel